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Submission #995289

# Submission time Handle Problem Language Result Execution time Memory
995289 2024-06-08T19:13:24 Z biank Data Transfer (IOI19_transfer) C++14
0 / 100
 5 ms 2504 KB 
#include "transfer.h"
 
using namespace std;
 
#define sz(x) int(x.size())
#define all(x) begin(x), end(x)
 
vector<int> parity(vector<int> source) {
    int log = sz(source) == 63 ? 6 : 8;
    vector<int> par(log, 0);
    for (int i = 0; i < sz(source); i++) {
        for (int j = 0; j < log; j++) {
            if ((i + 1) >> j & 1) par[j] ^= source[i];
        }
    }
    return par;
}
 
vector<int> get_attachment(vector<int> source) {
    return parity(source);
}
 
vector<int> retrieve(vector<int> data) {
    int cut = sz(data) == 69 ? 63 : 255;
    vector<int> source(begin(data), begin(data) + cut);
    vector<int> code(begin(data) + cut, end(data));
    vector<int> par = parity(source);
    int log = sz(par);
    int x = 0;
    for (int i = 0; i < log; i++) {
        if (code[i] != par[i]) x ^= 1 << i;
    }
    if (x != 0) source[x - 1] ^= 1;
    return source;
}

Subtask #1
0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 800 KB WA in grader: wrong source retrieval
2 Halted 0 ms 0 KB -

Subtask #2
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 2504 KB WA in grader: wrong source retrieval
2 Halted 0 ms 0 KB -